Valve-reseating tool



Dec. 29 '1925. 1,567,336

I 1. c. SHAW VALVE RESEATING TOOL Filed June 11. 1924 wlmsssa's wow-QM 7BY ATTORNEY lie Patented Dec. 29, 1925.

UNITED STATES PATENT OFFICE.

IRA CLAYTON SHAW, OF INDIANA, PENNSYLVANIA, ASSIGNOR OF NE-HALF TO LYNNM. KELLY, OF INDIANA, PENNSYLVANIA.

VALVE-RESEATIN G TOOL.

Application filed June 11, 1924. Serial No. 719,400.

I '0 all whom it may concern:

Be it known that I, IRA C. SHAW, citizen of the United States, residingat Indiana, in the county of Indiana and State of Pennsylvania, haveinvented a new and useful Valve-Reseating Tool, of which the followingis a specification.

This invention relates to a tool adapted especially for grinding globevalves and their seats when they have become worn or pitted in use, soas to provide a uniform fluid tight contact therebetween.

The general object of the invention is to provide a tool which isadapted to be used in connection with a valve holder or cage. and isprovided with a set of interchangeable heads for grinding valves ofdifferent sizes.

The objects and advantages of the invention will be more fully set forthin the following detailed description taken in connection with the.accompanying drawings, which illustrate the preferred form of theinvention.

In the drawings:

Figure 1 is a vertical sectional view of the invention as used ingrinding a valve head.

Figure 2 is a sectional view of the tool and valve holder or cage takenon the line 22 of Figure 1.

Figure 3 is a perspective view of the grinding element and its stemconstituting a part of the invention.

Figure 4 is a perspective view of a bush ing used in connection with thevalve holder.

Figure 5 is a sectional view similar to Figure 1 but illustrating avalve of larger size.

The tool which constitutes the subject of the invention includes arotatably supported stem 12 formed at its upper end with a noncircularextension 13 adapted to be received within the chuck of a bit brace, orother device used for rotating the same. The lower end of the stem 12has a reduced threaded end 14 on which the grinding head 15 is adaptedto be screwed. This grinding head has an inner concave face 16, and anouter convex face 17 of fine emery, or other material suitable forgrinding the valve and its seat. The head 15 is reversible, and Whenattached to the stem 12 in the manner shown in Figure 3, is adapted togrind the valve head, and when attached the other side up is adapted togrind the seat of a valve of the next larger size. A number of differentgrinding heads may be used interchangeably with the same stein.

In grinding a valve head, the tool is used in connection with a cage orholder 18, the main portion of which is cylindrical and comparativelylarge, and may, if desired, have a portion of its sides cut away, asshown at 18. The lower end of the cage 18 is internally threaded toreceive a bushing 19, as shown in Figure 1. The internal diameter ofthis bushing is of the proper size to receive the threaded end of avalve hood 20, which carries the stem 21 of the valve head 22 which isto be ground. Screws 28 are threaded horizontally through opposite sidesof the cage 18, and are provided with winged heads 24:, by means ofwhich they may be conveniently turned. The bushing 19 isprovided on itsinner face with opposed notches 25 adapted to receive the inner ends ofthe screws 23, and thereby lock the bushing against displacement. Afterthe bushing, the valve hood and valve have been placed in properposition within the cage 18, the inner ends of the screws 23 traversethe notches 25, and are brought into clamping relation to the valve head22 and hold the same against rotation while it is being ground.

The upper end of the cage 18 has an internally threaded reducedextension 26 adapted to receive the hood 27, which may be of the nextlarger size than the hood 20, and the stem 12 is of the proper diameterto rotate freely and be guided within the hood 27. When the abovedescribed parts have been assembled, as shown in Figure 1, the valve 22may be ground smooth by rotating the stem 12 and grinding head 15 bymeans of a bit brace or other suitable means.

In order to grind a valve of the next larger size, the bushing 19 iremoved and replaced by a bushing 28, as shown in F igure 5, which hasan internal diameter of the proper size to receive the hood 29 whichcarries the stem 30 of the valve 31, which is of the next size largerthan the valve 22. In connection with this assembly, the grind ing head15 is replaced by a similar grinding head of the proper size to fit thevalve 31. If desired, the valve may be formed with notches 32 which,when the valve has been adjusted to the proper position to be ground,are in position to be engaged by the inner ends of the screws 23,thereby forming a positive check against rotation of the valve.

From the foregoing description, it will be seen that I have provided atool for grinding valves and valve seats, which is of siinpleconstruction, consisting of few parts, and which may be easily adjustedfor valvesof different sizes, the hoods of the valves themselves beingused in connection with the tool during the grinding operation. WhileI'have shown and described the specific details of construction, it isto be understood that these are merely illustrative, and that variousmodifications may be made therein without departing from the salientfeatures'of the invention as herein claimed.

What is claimed is:

1. In a tool of the character described, the combination of a cagehaving internally threaded means at its lower end for receiving thethreaded end of a valve hood with the valve disposed within the cage,means extending through the sides of the cage for clamping the valvehead against rotation, a tool stein havinga valve grinding head at itslower end, and means at the upper end of the cage for rotatablysupporting and guiding the stem with the grinding head in contact withthe valve.

2. In a tool of the character described, the combination of a cagehaving at its lower end threaded means for engaging the threaded end ofa valve hood with the valve disposed within the cage, means extendingthrough the sides of the cage for clamping the valve head againstrotation, means at the upper end of the cage for securing the threadedend of another valve hood, a tool stein slidably and rotatably guided insaid last mentioned valve hood, and a grinding head secured to the lowerend of said stem in position to grind the valve supported in.

gageable with the valve head to clamp the" same, a tool stem having avalve grinding head at its lower end, and means at the upper end of thecage for rotatably supporting and guiding the tool stem with thegrinding head in contact with the valve.

In a tool of the'character described, the combination of a cage having abushing threadedinto its lower-end and adapted to receive the threadedend of a valve hood with the valve disposed within the cage, saidbushing having radial notches in its upper face, oppositely disposedmeans threaded through the sides of the cage and extending through saidnotches to lock the bushing and engageable with the valve head to clampthe same, means at the upper end of the cage for securing the threadedend of another valve hood, a tool stem slidably and rotatably guided insaid last mentioned valve hood, and a grinding-head secured to the lowerend of the tool stem in position to grind the valve supported in thefirst mentioned valve hood when the tool stem is so guided. I

5. In a tool of the character described, the combination of avalve-hood, means-for supporting a second valve hood in opposed relationto the other and in axial alinement, a

stein'slidably and rotatably. sup oorted in one of? said hoods, and agrinding ead car ried by'the inner end of said stem in position tooperate ona valve mounted in the other hood.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature.

IRA CLAYTON SHAW.

